1. The problem statement, all variables and given/known data A plane heads out to L.A with a velocity of 220m/s in a NE direction, relative to the ground, and encounters a wind blowing head-on at 45m/s, what is the resultant velocity of the plane, relative to the ground. 2. Relevant equations Pythagorean Theorem ? Simple subtraction 3. The attempt at a solution Here is an Image I made in paint to help visualize the solution of the problem... I believe I'm not solving this correctly. http://img443.imageshack.us/img443/9841/physics1.jpg [Broken] Uploaded with ImageShack.us I'm pretty much grabbing in the dark here since I cannot understand everything. Sorry for wasting your time in a way.